Coffee machine control circuit with better compatibility

Abstract

The utility model relates to the technical field of coffee machine control, in particular to a coffee machine control circuit with better compatibility, which comprises a high-voltage-resistant motor control circuit, an anti-interference electromagnetic valve control circuit and a microcontroller, direct current motors of the coffee machine are controlled by the motor control circuit in a one-to-one correspondence mode, electromagnetic valves of the coffee machine are controlled by the electromagnetic valve control circuit in a one-to-one correspondence mode, and the microcontroller controls the motor control circuit and the electromagnetic valve control circuit to be connected and drives the corresponding direct current motors and the corresponding electromagnetic valves. The problem that the performance of the coffee machine is limited due to the fact that an existing coffee machine cannot be compatible with model selection of more peripheral devices is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machine control, in particular to a coffee machine control circuit with better compatibility. Background Art

[0002] As a modern intelligent appliance, a coffee machine is designed to make various types and flavors of coffee. Different coffee machines may have different functions, but generally, they often include functions such as extraction, grinding, cleaning, descaling, and stirring. The realization of these functions mainly involves the control of different solenoid valves (thus indirectly controlling devices such as water pumps) and motors (such as bean grinders).

[0003] However, in traditional coffee machines, the control circuits of solenoid valves and motors are respectively as Figure 1 and Figure 2 shown.

[0004] This solenoid valve control circuit ( Figure 1 ) adopts a scheme in which a single-chip microcomputer directly controls the solenoid valve through a triode. When the solenoid valve or the device controlled by the solenoid valve (such as a water pump) is powered on or plugged in, interference will cause mis-conduction of this solenoid valve or the device controlled by the solenoid valve, and sudden changes in the grid voltage will also cause mis-conduction. Although setting a diode can reduce certain interference (such as back electromotive force), when the power of the device controlled by the solenoid valve is large, the problem of mis-conduction still cannot be avoided. Therefore, the selection of solenoid valves and the devices controlled by solenoid valves in current coffee machines is restricted, and high-power devices cannot be compatible.

[0005] This motor control circuit ( Figure 2 ) adopts a scheme in which a single-chip microcomputer directly controls the motor through a triode and a relay. Similarly, only setting a diode can reduce certain interference (such as back electromotive force). When a motor with a larger power is selected and the relay needs to withstand a larger voltage, it will exceed the voltage tolerance range of the triode, resulting in the triode being burned out, and even the single-chip microcomputer being burned out. Therefore, the selection of motors in current coffee machines is restricted, and high-power motors cannot be compatible.

[0006] In summary, due to the defects of the current solenoid valve and motor control circuits in traditional coffee machines, the selection of more peripheral devices cannot be compatible, resulting in the performance of the coffee machine not being further improved. Summary of the Utility Model

[0007] Aiming at the above defects, the purpose of the utility model is to provide a coffee machine control circuit with better compatibility, which solves the problem that the existing coffee machine cannot be compatible with the selection of more peripheral devices, resulting in limited performance of the coffee machine.

[0008] To achieve this purpose, the utility model adopts the following technical solutions:

[0009] A coffee machine control circuit with better compatibility, including a high-voltage-resistant motor control circuit, an anti-interference solenoid valve control circuit, and a microcontroller; the DC motors of the coffee machine are respectively controlled by the motor control circuit one by one, the solenoid valves of the coffee machine are respectively controlled by the solenoid valve control circuit one by one, and the microcontroller controls the conduction of the motor control circuit and the solenoid valve control circuit respectively to drive the corresponding DC motors and solenoid valves;

[0010] The motor control circuit includes a relay K1, a diode D6, a high-voltage-resistant switch module, and a switch module; the switch contact of the relay K1 is arranged on the power line of the DC motor, one end and the other end of the coil of the relay K1 are respectively electrically connected to the cathode and anode of the diode D6, the high-voltage-resistant switch module is arranged between one end of the coil of the relay K1 and the power supply VCC, the switch module is arranged between the other end of the coil of the relay K1 and the ground, and the high-voltage-resistant switch module and the switch module are respectively electrically connected to the microcontroller;

[0011] When the microcontroller controls both the high-voltage-resistant switch module and the switch module to conduct, the switch contact of the relay K1 closes to drive the DC motor.

[0012] Further, the solenoid valve control circuit includes a triode Q6, a resistor R14, a resistor R25, a resistor R27, and an anti-interference module; the anti-interference module is arranged between the solenoid valve and the live wire, the collector of the triode Q6 is connected to the anti-interference module in series after the resistor R27, the emitter of the triode Q6 is grounded, the resistor R25 is connected in parallel between the emitter and the base of the triode Q6, and the base of the triode Q6 is connected to the microcontroller in series after the resistor R14;

[0013] When the microcontroller controls the triode Q6 to conduct, the solenoid valve is driven.

[0014] Further, the motor control circuit further includes an AC-to-DC conversion module; the input end of the AC-to-DC conversion module is connected to alternating current, the output end of the AC-to-DC conversion module is electrically connected to the DC motor, and the switch contact of the relay K1 is arranged on the live wire of the input end of the AC-to-DC conversion module;

[0015] When the switch contact of the relay K1 closes, the AC-to-DC conversion module converts the alternating current into direct current to drive the DC motor.

[0016] Further, the high-voltage withstand switch module includes a resistor R10, a resistor R16, a resistor R9, a resistor R26, a MOS transistor Q2, and a triode Q5; the drain of the MOS transistor Q2 is electrically connected to one end of the coil of the relay K1, the source of the MOS transistor Q2 is connected to the power supply VCC, the resistor R10 is connected in parallel between the source and the base of the MOS transistor Q2, the base of the MOS transistor Q2 is connected in series with the resistor R16 and then electrically connected to the collector of the triode Q5, the emitter of the triode Q5 is grounded, the resistor R26 is connected in parallel between the emitter and the base of the triode Q5, and the base of the triode Q5 is connected in series with the resistor R9 and then electrically connected to the microcontroller;

[0017] When the microcontroller controls both the MOS transistor Q2 and the triode Q5 to be turned on, the high-voltage withstand switch module is turned on.

[0018] Further, the switch module includes a triode Q4, a resistor R23, and a resistor R24; the collector of the triode Q4 is electrically connected to the other end of the coil of the relay K1, the emitter of the triode Q4 is grounded, the resistor R24 is connected in parallel between the emitter and the base of the triode Q4, and the base of the triode Q4 is connected in series with the resistor R23 and then electrically connected to the microcontroller;

[0019] When the microcontroller controls the triode Q4 to be turned on, the switch module is turned on.

[0020] Further, the anti-interference module includes a triac SCR1, a capacitor C5, and a resistor R18; the first anode and the second anode of the triac SCR1 are respectively electrically connected to the solenoid valve and the live wire, the capacitor C5 and the resistor R18 are both connected in parallel between the gate and the second anode of the triac SCR1, and the gate of the triac SCR1 is electrically connected to the resistor R27.

[0021] Further, the capacitor C5 uses a capacitor 473.

[0022] Further, the AC-DC conversion module includes a capacitor CX3, a rectifier bridge BD1, a fuse F1, capacitors CY1 and CY2, a common-mode inductor L3, and a capacitor CX1. One end of the first coil and one end of the second coil of the common-mode inductor L3 are respectively connected to the neutral wire and the live wire. The capacitor CX1 is connected in parallel between one end of the first coil and one end of the second coil of the common-mode inductor L3. The other end of the first coil and the other end of the second coil of the common-mode inductor L3 are respectively grounded through the capacitor CY1 and the capacitor CY2. The other end of the first coil of the common-mode inductor L3 is connected in series with the fuse F1 and then electrically connected to the first input terminal of the rectifier bridge BD1. The other end of the second coil of the common-mode inductor L3 is electrically connected to the second input terminal of the rectifier bridge BD1. The first output terminal and the second output terminal of the rectifier bridge BD1 are connected to the DC motor, and the capacitor CX3 is connected in parallel between the first output terminal and the second output terminal of the rectifier bridge BD1.

[0023] The technical solution provided by the present utility model may include the following beneficial effects: Replacing the control circuits of all DC motors in the coffee machine with high-voltage-resistant motor control circuits can increase the range of motor selection for the coffee machine and be compatible with motors of more power specifications. Replacing the control circuits of all solenoid valves in the coffee machine with anti-interference solenoid valve control circuits can effectively resist the interference caused by the solenoid valves or the devices controlled by the solenoid valves during power-on or plugging and unplugging, and be compatible with more specifications of solenoid valves and solenoid valve control devices, thereby further improving the performance of the coffee machine.

[0024] More importantly, for the motor control circuit to further improve compatibility, on the basis of setting a diode D6 to absorb the back electromotive force in the relay K1, the original method of controlling the relay K1 with a single triode is changed to a method of jointly controlling the relay K1 by a high-voltage-resistant switch module and a switch module. The switching of the relay K1 is more stable, which is beneficial to the stable control of motors of various power specifications. At the same time, if a high-power motor is used, the relay K1 needs to be upgraded accordingly, and the power supply VCC required for the switching contact of the relay K1 to close is larger. Therefore, a high-voltage-resistant switch module is used between the relay K1 and the power supply VCC so that it can withstand a larger voltage and will not be burned out. Description of the Drawings

[0025] Figure 1 is the circuit schematic diagram of the solenoid valve control circuit of a traditional coffee machine.

[0026] Figure 2 is the circuit schematic diagram of the motor control circuit of a traditional coffee machine.

[0027] Figure 3 is the schematic diagram of a coffee machine control circuit with better compatibility in one embodiment of the present utility model.

[0028] Figure 4 is as shown in Figure 3 the circuit schematic diagram of the motor control circuit shown.

[0029] Figure 5 is as shown in Figure 3 the circuit schematic diagram of the solenoid valve control circuit shown.

[0030] Among them: motor control circuit 1, solenoid valve control circuit 2, microcontroller 3, relay K1, diode D6, high-voltage withstand switch module 11, switch module 12, triode Q6, resistor R14, resistor R25, resistor R27, anti-interference module 21, AC-DC conversion module 13, resistor R10, resistor R16, resistor R9, resistor R26, MOS transistor Q2, triode Q5, triode Q4, resistor R23, resistor R24, bidirectional thyristor SCR1, capacitor C5, resistor R18, capacitor CX3, rectifier bridge BD1, fuse F1, capacitor CY1, capacitor CY2, common-mode inductor L3, capacitor CX1. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0032] In the description of the embodiments of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0033] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0034] Next, in combination with Figures 3 to 5 , a coffee machine control circuit with better compatibility in the embodiments of the present invention will be described.

[0035] A coffee machine control circuit with better compatibility, including a motor control circuit 1 with high voltage resistance, an anti-interference solenoid valve control circuit 2, and a microcontroller 3; the DC motors of the coffee machine are respectively controlled by the motor control circuit 1 one by one, and the solenoid valves of the coffee machine are respectively controlled by the solenoid valve control circuit 2 one by one. The microcontroller 3 controls the conduction of the motor control circuit 1 and the solenoid valve control circuit 2 respectively to drive the corresponding DC motors and solenoid valves.

[0036] The motor control circuit 1 includes a relay K1, a diode D6, a high voltage resistance switch module 11, and a switch module 12; the switch contact of the relay K1 is arranged on the power supply line of the DC motor. One end and the other end of the coil of the relay K1 are respectively electrically connected to the cathode and anode of the diode D6. A high voltage resistance switch module 11 is arranged between one end of the coil of the relay K1 and the power supply VCC, and a switch module 12 is arranged between the other end of the coil of the relay K1 and the ground. The high voltage resistance switch module 11 and the switch module 12 are respectively electrically connected to the microcontroller 3.

[0037] When the microcontroller 3 controls both the high voltage resistance switch module 11 and the switch module 12 to conduct, the switch contact of the relay K1 closes to drive the DC motor.

[0038] In a preferred embodiment of the coffee machine control circuit with better compatibility proposed by the present utility model, as Figures 3 to 5 shown, replacing the control circuits of all DC motors in the coffee machine with the high voltage resistance motor control circuit 1 can make the motor selection range of the coffee machine larger and be compatible with motors of more power specifications; replacing the control circuits of all solenoid valves in the coffee machine with the anti-interference solenoid valve control circuit 2 can effectively resist the interference caused when the solenoid valve or the equipment controlled by the solenoid valve is powered on or plugged in, and be compatible with more specifications of solenoid valves and solenoid valve control equipment; thus further improving the performance of the coffee machine.

[0039] More importantly, for the motor control circuit 1 to further improve compatibility, on the basis of setting the diode D6 in the relay K1 to absorb the back electromotive force, the original method of controlling the relay K1 with a single triode is changed to the method of jointly controlling the relay K1 by the high voltage resistance switch module 11 and the switch module 12. The switch of the relay K1 is more stable, which is beneficial to the control stability of motors of various power specifications; at the same time, if a high-power motor is used, the relay K1 needs to be upgraded accordingly, and the power supply VCC required for the switch contact of the relay K1 to close is larger. Therefore, a high voltage resistance switch module 11 is used between the relay K1 and the power supply VCC so that it can withstand a larger voltage and will not be burned out.

[0040] Further, the solenoid valve control circuit 2 includes a triode Q6, a resistor R14, a resistor R25, a resistor R27, and an anti-interference module 21; an anti-interference module 21 is provided between the solenoid valve and the live wire, the collector of the triode Q6 is connected in series with the resistor R27 and then electrically connected to the anti-interference module 21, the emitter of the triode Q6 is grounded, the resistor R25 is connected in parallel between the emitter and the base of the triode Q6, and the base of the triode Q6 is connected in series with the resistor R14 and then electrically connected to the microcontroller 3;

[0041] When the microcontroller 3 controls the triode Q6 to conduct, the solenoid valve is driven.

[0042] In this embodiment, in order to improve its own anti-interference performance, the solenoid valve control circuit 2 selects to electrically connect the anti-interference module 21 before the triode Q6 is electrically connected to the solenoid valve. Thus, whether the triode Q6 controls the solenoid valve or interference is transmitted back from the solenoid valve, the anti-interference module 21 can be used to eliminate and absorb the interference, ensuring the stability of the operation of the solenoid valve control circuit 2.

[0043] Further, the motor control circuit 1 further includes an AC-DC conversion module 13; the input end of the AC-DC conversion module 13 is connected to alternating current, the output end of the AC-DC conversion module 13 is electrically connected to the DC motor, and the switching contact of the relay K1 is arranged on the live wire at the input end of the AC-DC conversion module 13;

[0044] When the switching contact of the relay K1 is closed, the AC-DC conversion module 13 converts the alternating current into direct current to drive the DC motor.

[0045] In this embodiment, when the DC motor connected to the motor control circuit 1 has a relatively large power and the coffee machine power supply module is not convenient to be converted separately, the conversion circuit is arranged in the motor control circuit 1, and the start and stop of the AC-DC conversion module 13 are controlled by the relay K1. It is not needed to be used for a long time, reducing power consumption, and also being beneficial to improving the stability of the coffee machine circuit.

[0046] Further, the high-voltage withstand switching module 11 includes a resistor R10, a resistor R16, a resistor R9, a resistor R26, an MOS transistor Q2, and a triode Q5; the drain of the MOS transistor Q2 is electrically connected to one end of the coil of the relay K1, the source of the MOS transistor Q2 is connected to the power supply VCC, the resistor R10 is connected in parallel between the source and the base of the MOS transistor Q2, the base of the MOS transistor Q2 is connected in series with the resistor R16 and then electrically connected to the collector of the triode Q5, the emitter of the triode Q5 is grounded, the resistor R26 is connected in parallel between the emitter and the base of the triode Q5, and the base of the triode Q5 is connected in series with the resistor R9 and then electrically connected to the microcontroller 3;

[0047] When the microcontroller 3 controls both the MOS transistor Q2 and the triode Q5 to conduct, the high-voltage withstand switching module 11 conducts.

[0048] In this embodiment, to achieve high voltage withstand and switching functions, the high voltage withstand switch module 11 is mainly composed of a MOS transistor Q2 and a triode Q5. The triode Q5 can be driven by a microcontroller 3 (such as an MCU). The MOS transistor Q2 has a stronger voltage withstand ability. The combination of the two can withstand a higher power supply voltage and implement switch control of the relay K1.

[0049] Further, the switch module 12 includes a triode Q4, a resistor R23, and a resistor R24. The collector of the triode Q4 is electrically connected to the other end of the coil of the relay K1. The emitter of the triode Q4 is grounded. The resistor R24 is connected in parallel between the emitter and the base of the triode Q4. The base of the triode Q4 is electrically connected to the microcontroller 3 after being connected in series with the resistor R23.

[0050] When the microcontroller 3 controls the triode Q4 to be fully conducting, the switch module 12 is conducting.

[0051] In this embodiment, since the switch module 12 is used to control whether the relay K1 is grounded, there is no need to consider the voltage withstand problem. A switch circuit composed of the triode Q4 can be used to achieve the switch function.

[0052] Further, the anti-interference module 21 includes a triac SCR1, a capacitor C5, and a resistor R18. The first anode and the second anode of the triac SCR1 are respectively electrically connected to the solenoid valve and the live wire. The capacitor C5 and the resistor R18 are both connected in parallel between the gate and the second anode of the triac SCR1. The gate of the triac SCR1 is electrically connected to the resistor R27.

[0053] In this embodiment, the anti-interference module 21 first improves the stability of the switch by setting the triac SCR1 between the triode Q6 and the solenoid valve to be compatible with more specifications of solenoid valves, and then filters by setting the capacitor C5 between the gate and the second anode of the triac SCR1 to achieve the effect of removing interference.

[0054] Further, the capacitor C5 uses the capacitor 473.

[0055] In this embodiment, during the test of filtering interference, the anti-interference module 21 found that when facing solenoid valves of different specifications, using the capacitor 473 for the capacitor C5 has the best effect.

[0056] Further, the AC-DC conversion module 13 includes a capacitor CX3, a rectifier bridge BD1, a fuse F1, capacitors CY1 and CY2, a common-mode inductor L3, and a capacitor CX1. One end of the first coil and one end of the second coil of the common-mode inductor L3 are connected to the neutral wire and the live wire respectively. The capacitor CX1 is connected in parallel between one end of the first coil and one end of the second coil of the common-mode inductor L3. The other end of the first coil and the other end of the second coil of the common-mode inductor L3 are grounded through the capacitors CY1 and CY2 respectively. The other end of the first coil of the common-mode inductor L3 is connected in series with the fuse F1 and then electrically connected to the first input terminal of the rectifier bridge BD1. The other end of the second coil of the common-mode inductor L3 is electrically connected to the second input terminal of the rectifier bridge BD1. The first output terminal and the second output terminal of the rectifier bridge BD1 are connected to a DC motor. The capacitor CX3 is connected in parallel between the first output terminal and the second output terminal of the rectifier bridge BD1.

[0057] In this embodiment, the AC-DC conversion module 13 is composed of a capacitor CX3, a rectifier bridge BD1, a fuse F1, capacitors CY1 and CY2, a common-mode inductor L3, and a capacitor CX1, which can realize the shaping and filtering of alternating current and output direct current with stable temperature. At the same time, the fuse F1 can be used to further protect the motor control circuit 1. When the single DC motor of the coffee machine is overcurrent, the circuit can be cut off at the end of the corresponding motor control circuit 1 to protect the DC motor and the rest of the coffee machine circuit.

[0058] Other components and operations of a coffee machine control circuit with better compatibility according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0059] In the description of this specification, the descriptions referring to the terms "embodiment", "example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A coffee machine control circuit with better compatibility, characterized in that: It includes a motor control circuit with high breakdown voltage, an anti-interference solenoid valve control circuit, and a microcontroller. The DC motors of the coffee machine are respectively controlled by the motor control circuit one by one, and the solenoid valves of the coffee machine are respectively controlled by the solenoid valve control circuit one by one. The microcontroller controls the conduction of the motor control circuit and the solenoid valve control circuit respectively to drive the corresponding DC motors and solenoid valves. The motor control circuit includes a relay K1, a diode D6, a high-breakdown-voltage switch module, and a switch module. The switch contact of the relay K1 is arranged on the power line of the DC motor. One end and the other end of the coil of the relay K1 are electrically connected to the cathode and anode of the diode D6 respectively. The high-breakdown-voltage switch module is arranged between one end of the coil of the relay K1 and the power supply VCC, and the switch module is arranged between the other end of the coil of the relay K1 and the ground. The high-breakdown-voltage switch module and the switch module are respectively electrically connected to the microcontroller. When the microcontroller controls both the high-breakdown-voltage switch module and the switch module to conduct, the switch contact of the relay K1 closes to drive the DC motor.

2. The coffee machine control circuit with better compatibility according to claim 1, characterized in that: The solenoid valve control circuit includes a triode Q6, a resistor R14, a resistor R25, a resistor R27, and an anti-interference module. The anti-interference module is arranged between the solenoid valve and the live wire. The collector of the triode Q6 is connected to the anti-interference module in series after the resistor R27. The emitter of the triode Q6 is grounded. The resistor R25 is connected in parallel between the emitter and the base of the triode Q6. The base of the triode Q6 is connected to the microcontroller in series after the resistor R14. When the microcontroller controls the triode Q6 to conduct, it drives the solenoid valve.

3. The coffee machine control circuit with better compatibility according to claim 1, characterized in that: The motor control circuit further includes an AC-to-DC conversion module. The input end of the AC-to-DC conversion module is connected to the alternating current, the output end of the AC-to-DC conversion module is electrically connected to the DC motor, and the switch contact of the relay K1 is arranged on the live wire of the input end of the AC-to-DC conversion module. When the switch contact of the relay K1 closes, the AC-to-DC conversion module converts the alternating current into direct current to drive the DC motor.

4. The control circuit of a coffee machine with better compatibility according to claim 1, characterized in that: The high-breakdown-voltage switch module includes a resistor R10, a resistor R16, a resistor R9, a resistor R26, a MOS transistor Q2, and a triode Q5. The drain of the MOS transistor Q2 is electrically connected to one end of the coil of the relay K1. The source of the MOS transistor Q2 is connected to the power supply VCC. The resistor R10 is connected in parallel between the source and the base of the MOS transistor Q2. The base of the MOS transistor Q2 is connected to the collector of the triode Q5 in series after the resistor R16. The emitter of the triode Q5 is grounded. The resistor R26 is connected in parallel between the emitter and the base of the triode Q5. The base of the triode Q5 is connected to the microcontroller in series after the resistor R9. When the microcontroller controls both the MOS transistor Q2 and the triode Q5 to conduct, the high-breakdown-voltage switch module conducts.

5. The coffee machine control circuit with better compatibility according to claim 1, characterized in that: The switch module includes a triode Q4, a resistor R23, and a resistor R24; the collector of the triode Q4 is electrically connected to the other end of the coil of the relay K1, the emitter of the triode Q4 is grounded, the resistor R24 is connected in parallel between the emitter and the base of the triode Q4, and the base of the triode Q4 is connected in series with the resistor R23 and then electrically connected to the microcontroller; When the microcontroller controls the triode Q4 to be turned on, the switch module is turned on.

6. The coffee machine control circuit with better compatibility according to claim 2, characterized in that: The anti-interference module includes a triac SCR1, a capacitor C5, and a resistor R18; the first anode and the second anode of the triac SCR1 are respectively electrically connected to the solenoid valve and the live wire, the capacitor C5 and the resistor R18 are both connected in parallel between the gate and the second anode of the triac SCR1, and the gate of the triac SCR1 is electrically connected to the resistor R27.

7. The coffee machine control circuit with better compatibility according to claim 6, characterized in that: The capacitor C5 uses a capacitor 473.

8. The coffee machine control circuit with better compatibility according to claim 3, characterized in that: The AC-DC conversion module includes a capacitor CX3, a rectifier bridge BD1, a fuse F1, a capacitor CY1, a capacitor CY2, a common-mode inductor L3, and a capacitor CX1; one end of the first coil and one end of the second coil of the common-mode inductor L3 are respectively connected to the neutral wire and the live wire, the capacitor CX1 is connected in parallel between one end of the first coil and one end of the second coil of the common-mode inductor L3, the other end of the first coil and the other end of the second coil of the common-mode inductor L3 are respectively grounded through the capacitor CY1 and the capacitor CY2, the other end of the first coil of the common-mode inductor L3 is connected in series with the fuse F1 and then electrically connected to the first input terminal of the rectifier bridge BD1, the other end of the second coil of the common-mode inductor L3 is electrically connected to the second input terminal of the rectifier bridge BD1, the first output terminal and the second output terminal of the rectifier bridge BD1 are connected to the DC motor, and the capacitor CX3 is connected in parallel between the first output terminal and the second output terminal of the rectifier bridge BD1.

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